[Marek_Tucan]

I dare guess light infantry troops in fact do hump more on their backs than regular infantry - they're light because they have a light rear - less trucks, less and lighter guns and so on... On some case it enables them to do as Japanese during their advance to Port Moresby (or to Singapore or whatever), sometimes it turns against them (Guadalcanal, Milne Bay, almost any place where the Allies have already learned "how to"...).